Do I get my 6 year old son officially diagnosed???

Hi, I have just joined the group, and in need of some advice, a quick overview of what we have in place for my child so far 

Henry is in Mainstream school with a 1:1 support teacher

he has a occupational therapist that visits him 

he has a speech and language therapist 

he’s been seen  by the school child psychologist 

he has just recently been given a EHCP, his needs are social, emotional and emotional dysregulation, which can result in outburst of anger towards his peers and teachers, hitting, kicking, throwing chairs and equipment 

the last 2 years since Henry started in his reception class at school have been beyond stressful and upsetting, a constant battle between myself and the headteacher, staff and the school policies, as the school were not acknowledging or addressing his needs, it’s been a massive learning curve these last 2 years for the school as they were not exactly SEN friendly. 
I considered changing schools many times but Henry always wanted to go and he was forming friendships and a positive relationship with his 1:1 so he stayed. 

we have been waiting for well over a year now to get an appointment for his initial social communication appointment to get a diagnosis, the letter arrived 5 days ago, I am now unsure if I want that official diagnosis, or as I call it “labelling” 

I don’t want that officials diagnosis to potentially affect his life, as people can  be prejudice and have misinformed views of what autism is

So I was hoping for advice whether I should or shouldn’t do it, and if any other parent is in the Same position ?? 
i have spoken to WESAIL, WISENDSS they have said it would work in Henry’s favour to do it, but im Still not 100% sure 

thank you for taking the time to read my message 

Lindsay